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FAT32系统中长文件名的存储 - C/C++ - 清泛网 - 专注C/C++及内核技术
...首字符改写E5H)，都会使长文件名形同虚设。
（长文件名如何与短文件名对应？仅靠她们之间的位置关系？）
长文件名和短文件名之间的联系光靠他们之间的位置关系维系显然远远不够。其实，长文件名的0xD字节的校验和起...
What is the use of the square brackets [] in sql statements?
...y brackets if you want to use them as column / table / sp / etc. names. In MySQL angled single quotes ```` would be the equivalent of this.
– Baz Guvenkaya
Feb 9 '17 at 5:03
2
...
Add Foreign Key to existing table
...is link. It has helped me with errno 150:
http://verysimple.com/2006/10/22/mysql-error-number-1005-cant-create-table-mydbsql-328_45frm-errno-150/
On the top of my head two things come to mind.
Is your foreign key index a unique name in the whole database (#3 in the list)?
Are you trying to set th...
Check if table exists without using “select from”
...elf stated to do it is the proper way. There is no 'exists' type statement MySql. 'Exists' in MySql is a clause which requires an operation such as SELECT, UPDATE, or DELETE.
– doogle
Jan 12 '12 at 1:51
...
常用Sql - 爬虫/数据库 - 清泛IT社区，为创新赋能！
本帖最后由 zqp2013 于 2015-3-17 22:06 编辑
mysql：drop table if exists tablename;
不能写成
drop table tablename if exists tablename;
mysql：建立索引Sql
CREATE TABLE tablename (
`ID` &nbs...
How to create a table from select query result in SQL Server 2008 [duplicate]
...a new table, but instead appends the data into an existing table, e.g. dev.mysql.com/doc/refman/8.0/en/….
– flow2k
May 19 at 8:07
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UCenter实现各系统通信的原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...统通信的原理===本文导读===UCenter实现各系统通信的原理如何实现phpcms和discuz的Cookie同步===全文阅读===整合phpcms v9和discuz X3.2实现同步登陆、退出免激活===本文导读===
整合phpcms v9和discuz X3.2实现同步登陆、退出免激活
如何实现php...
Explicit vs implicit SQL joins
...
On MySQL 5.1.51, both queries have identical execution plans:
mysql> explain select * from table1 a inner join table2 b on a.pid = b.pid;
+----+-------------+-------+------+---------------+------+---------+--------------+---...
Remove all spaces from a string in SQL Server
...ct
'"' + c + '"' [IN], '"' + replace(c, ' ', '') + '"' [OUT]
from #t
union all select
'"' + v + '"', '"' + replace(v, ' ', '') + '"'
from #t
Result
IN OUT
===================
"a a " "aa"
"a a " "aa"
" a a " "aa"
" a a " "aa"
"a a" "aa"...
PHP编译configure时常见错误 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...e gmp.h
centos: yum install gmp-devel
14、Configure: error: Cannot find MySQL header files under /usr. Note that the MySQL client library is not bundled anymore!
yum install mysql-devel (For Redhat & Fedora)
# apt-get install libmysql++-dev (For Ubuntu)
15、Configure: error: Please reinstall ...